Show-Me State shooters have been asking when CZ's next striker gun would land, and here it is. The DUTY 4.0 is a 9x19mm service pistol built on a serialized modular chassis, which means the polymer grip frame around it can change while the serial number stays put. Four versions come to Missouri: the DUTY 4.0 C compact with 15+1 rounds, the full-size DUTY 4.0 F with 17+1, and an MS version of each that adds a manual thumb safety. All four share the same 4-inch barrel, a direct-mount optics-ready slide and fixed sights.

From Chesterfield and St. Charles down the river to Ste. Genevieve and Perryville, and west to Rolla and Columbia, this is the kind of pistol Missouri buyers pick for the nightstand, the range bag and everyday carry. The compact rides easier under a shirt; the full-size gives a longer grip for duty belts and match days. Both weigh under 28 ounces.

Pick the F when the gun lives on a belt or in a bedside rather than under a T-shirt. Over the carry-size it adds two rounds (17+1 against 15+1), about 8 mm of grip and 10 g of weight, and nothing else changes.

Under the DUTY name sits a serialized modular chassis, a 1.3 in (33 mm) wide fiberglass-reinforced polymer frame, a 102 mm barrel and a trigger CZ rates at 25 ± 4 N (5.6 ± 0.9 lbs) with a 0.16 in (4 mm) reset. The slide is optics-ready by direct mount rather than an adapter plate. Fixed sights come standard, and the barrel is not threaded.

The MS model carries a frame-mounted manual thumb safety on top of the firing pin block, trigger safety and trigger-bar safety. Everything else, chassis, trigger, slide and optics cut, is the same as the version without the lever.

Who is it for: home defense, duty use, competition and long range sessions where the extra grip and two more rounds matter. If you already shoot a P-10, the DUTY is the next step in the same family, with a new chassis and the optics done right.

Missouri makes this simple. There is no permit to acquire and no waiting period, so once your DUTY 4.0 reaches the Missouri dealer you named at checkout, that dealer runs the background check and hands it over the same visit. Ammo and gear ship straight to your door. Price and stock are confirmed live when you order, before you pay.

Questions buyers ask: Do I need a permit to buy the CZ DUTY 4.0 in Missouri? No. Missouri repealed its permit to acquire in 2007 and has no waiting period. Your dealer runs the federal background check when you pick it up. Which DUTY 4.0 is better for carry in St. Louis traffic and summer heat? The C compact is 5.3 inches tall and carries 15+1, so it hides better under light clothing. The F adds a longer grip and two more rounds for range or duty use. Is the CZ DUTY 4.0 F MS the same gun as the F? Yes, apart from the manual thumb safety. Chassis, trigger, slide and the 17+1 capacity are identical.